Line a baking sheet with parchment paper.
In a large bowl, place Buttermilk Biscuit Mix. Using a pastry blender, cut in cold butter until mixture is crumbly. Stir in 10 tablespoons water just until combined.
Turn out dough onto a heavily floured surface, and gently knead 4 to 6 times. Pat or roll dough to 1-inch thickness. Using a 2½-inch round cutter dipped in flour, cut dough without twisting cutter, rerolling scraps once. Place biscuits 2 inches apart on prepared pan. Refrigerate for 30 minutes.
Preheat oven to 425°.
Brush biscuits with cream.
Bake in top third of oven (about 4 inches from heat source) until golden brown and a wooden pick inserted in center comes out clean, about 15 minutes. Serve immediately.